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CBSE
Class 11 Chemistry
Equilibrium
Quiz 1
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The solubility of Ca
0%
6y²
0%
36 y
0%
64 y
0%
108 y
Explanation
108 y
A physician wishes to prepare a buffer solution at pH =85 that efficiently resists changes in pH yet contains only small concentration of the buffering agents. Which of the following weak acids together with its sodium salt would be best to use?
0%
2, 5-Dihydroxy benzoic acid (pK
0%
Acetoacetic acid (pK
0%
m-Chlorobenzoic acid (pK
0%
p-Chlorocinnamic acid (pK
Explanation
Acetoacetic acid (pK
Which of the following aqueous solutions will have highest pH?
0%
NaCl
0%
CH
0%
Na
0%
NH
Explanation
Na
What is the pH of a10 M solution of barium hydroxide, Ba (OH)
0%
11. 31
0%
11. 7
0%
13. 30
0%
None of these
Explanation
13. 30
Which of the following oxides is not expected to react with sodium hydroxide?
0%
CaO
0%
SiO
0%
BeO
0%
B
Explanation
CaO
The pH of a 10M NaOH solution is nearest to
0%
10
0%
7
0%
4
0%
-10
Explanation
4
It forms a salt NaX on reaction with alkali. The degree of hydrolysis of1 M solution of NaX is
0%
0. 0001%
0%
0. 01%
0%
0. 1%
0%
0. 15%
Explanation
0. 01%
When equal volumes of1 M NaOH and01 M HCl are mixed, the hydroxide ion concentration is
0%
7. 0
0%
1. 04
0%
12. 65
0%
2. 0
Explanation
12. 65
Solubility product of Ag
0%
2. 66 × 10
0%
4. 5 × 10
0%
5. 3 × 10
0%
2. 42 × 10
Explanation
5. 3 × 10
In a reversible chemical reaction at equilibrium, if the concentration of any one of the reactants is doubled, then the equilibrium constant will
0%
Also be Doubled
0%
Be Halved
0%
Remain the Same
0%
Become One-Fourth
Explanation
Remain the Same
When a neutral atom undergoes oxidation, the atoms oxidation state
0%
Decreases as it gains electrons
0%
Decreases as it loses electrons
0%
Increases as it gains electrons
0%
Increases as it loses electrons
Explanation
Increases as it loses electrons
0 h : 0 m : 1 s
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